7.Did John close the door?
Was the door closed by John?
8.I didn't take the money on the desk.
The money on the desk wasn't taken by me.
9.Who wrote the book?
By whom was the book written?
10.Whom did the taxi hit?
Who was hit by the taxi?
11.People believe there is no short cut to success.
It is believed that there is no short cut to success.内容来自 听力课堂网：http://www.tingclass.net/show-5855-18804-1.html